diff --git a/README.md b/README.md
index adfbc2f9..a4799dbc 100644
--- a/README.md
+++ b/README.md
@@ -86,14 +86,16 @@ To build a Robox locally, run the following:
 
 ```bash
 git clone https://github.com/lavabit/robox && cd robox
-./robox.sh box generic-BOX-PROVIDER
+./robox.sh box generic-BOX-PROVIDER-ARCH
 ```
 
-You will to replace the BOX and PROVIDER placeholders in the example above.  
+You will to replace the BOX, PROVIDER and ARCH placeholders in the example above.  
   
 Replace `BOX` with one of the these values:  `[alma8|alma9|alpine35|alpine36|alpine37|alpine38|alpine39|alpine310|alpine311|alpine312|alpine313|alpine314|alpine315|alpine316|alpine317|arch|centos6|centos7|centos8|centos8s|centos9s|debian8|debian9|debian10|debian11|devuan1|devuan2|devuan3|devuan4|dragonflybsd5|dragonflybsd6|fedora25|fedora26|fedora27|fedora28|fedora29|fedora30|fedora31|fedora32|fedora33|fedora34|fedora35|fedora36|fedora37|freebsd11|freebsd12|freebsd13|gentoo|hardenedbsd11|hardenedbsd12|hardenedbsd13|netbsd8|netbsd9|openbsd6|openbsd7|opensuse15|opensuse42|oracle7|oracle8|oracle8|rhel6|rhel7|rhel8|rocky8|rocky9|ubuntu1604|ubuntu1610|ubuntu1704|ubuntu1710|ubuntu1804|ubuntu1810|ubuntu1904|ubuntu1910|ubuntu2004|ubuntu2010|ubuntu2104|ubuntu2110|ubuntu2204|ubuntu2210|ubuntu2304]`
   
-And replace `PROVIDER` with one of these values: `[docker|hyperv|libvirt|parallels|virtualbox|vmware]`.  
+Replace `PROVIDER` with one of these values: `[docker|hyperv|libvirt|parallels|virtualbox|vmware]`
+
+And replace `ARCH` with one of these values: `[x32|x64|a32|a64|p32|p64|r32|r64|m32|m64]`
   
 A configuration for all of the distros is available for every provider, EXCEPT Docker. At present we have only adapted a subset of the configurations to build Docker/Podman images.